avcodec/libx264: remove NV21, its not supported

Regression introduced in 8d75aa8d79 Found-by: jamrial Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
8 years ago · 2633ac3a96
--- a/libavcodec/libx264.c
+++ b/libavcodec/libx264.c
@@ -747,9 +747,6 @@ static const enum AVPixelFormat pix_fmts_all[] = {
    AV_PIX_FMT_YUVJ444P,
    AV_PIX_FMT_NV12,
    AV_PIX_FMT_NV16,
 #ifdef X264_CSP_NV21
    AV_PIX_FMT_NV21,
 #endif
    AV_PIX_FMT_YUV420P10,
    AV_PIX_FMT_YUV422P10,
    AV_PIX_FMT_YUV444P10,